Pressure-actuated tool.



G. H. GILMAN. PRESSURE ACTUATED T00 APPLICATION man ocr. 24.1910.

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GEORGE H. GILMAN, OF CLAREMONT, NEW HAMISHIRE, ASSIGNOR, BY MESNE ASSIGN- v MENTS, TO SULLIVAN CORPORATION OF MASSACHUSETTS.

MACHINERY COMPANY, 0F BOSTON, MASSACHUSETTS, A

PRESSURE-ACTUATED TOOL.

Specification of Letters Patent. l]lla.teio1l;i1 Julie 15, 1915..

Original application tiled November 13, -1908, ASerial No. 462,402. Divided and this application filed October 1910. Serial N0. 588,618.

To all whom it may concern:

Beit known that I, GEORGE H. Gini/Ian, and a resiof Sullivan, and have invented an in Pressure-Actuated Tools,

following description, in connection withl the accompanying drawings, is a specification, like letters on the drawings representing like parts,

This invention relates to pressure-actuated tools, being more particularly concerned with the provision of improved :feeding dethe improved construction vof such devices.

This application is ya division of my prior co-'pending application, Serial No. 462,402,

dent of Claremont, county State of New Hampshire, improvement of which. the

. filed November 13, 1908.

The invention will be best understood by reference to the following description when taken in connection with the accompanying; illustration of one specific embodiment thereof while its scope will be more par ticularly pointed out in the appended claims.

In thedraWings: Figure 1 shows in side elevation, partly broken away, a pressurefed hammer drill embodying one form of my invention; Fig. 2 is a central, sectional elevation .of a portion of the supporting; or alaitting end of the feed cylinder; F 3 is a. sectional elevation on the line $l in Fig. 3; Fig. liis a plan, on an enlarged scale,

i* i ofkthe head block and its connections to the tool. andfeed cylinders; Fig. 5 is a longitudinal section in elevation of thc same taken onthe line 5-5 in Fig. 4.

Referring to the drawin and to the em.- bodiment of my invention which l have there disclosed for illustrative purposes, l have there shown a i'ineumatic tool, herein of the han'nner drill type, having: the cylinder l so connected to suitable pressure-actuated feeding' apparatus that the pressure fluid supplied. thereto through thc pipe 2 acts not only rcciprocatively to move the hammer piston 3 against the shank of the also acts initially to advance the tool to Yard the work and hold the drill forcibly' pressed against the same while the tool is in operation, all as repre sented in Fig. 1. ,f

While n'cssurc-actuated feeding means of any suitable construction may be employed, herein I have provided a feeding cylinder 5 adapted to copcrate with a suitable feed,- ing piston 5 (see. Fig. 5) therein contained. It is, of course, immaterial which of the cylinder and piston members is connected to the'tool, but in either event the remaining part serves to support the apparatus either by abutment against a wall or other support. ln the present instance the piston G serves as the abutting or supporting member, the cylinder being rigidly secured to the tool t0 move therewith on the support which l is provided by the xed piston.

.ln the present form of apparatus the pressure 'fluid for actuating the feed and the tool is controlled through a throttle valve, the handle for which is represented at 7, such valve being mounted in the connecting' piece S interposed between and rigidly secured to the 'feed cylinder 5 and the tool cylinder l.

ln devices of this class great trouble has been experienced from the employment of threaded 'joints for securing the feed and ioolfparts together and dil'liculty has been found in providing an attachment suitable for holdinfir the parts securely together'while capabley of withstanding the severe vibrator-y strains to which they kare subjected when used in the mine.

In the present construction l have provided accurately fitting,r `slip joints between the Afeed cylinder andthe connecting piece on the one side and the tool cylinder and connecting piece on the other, and have also provided means for clamping such parts securelyv together without the use of threaded lioints between the parts, and preferably through the ein; '.iyment of tapered or conical clamping means.

Referring more particularly to the construction shown in Figs. 4 and 5, the for` ward or inner end of the feed cylinder is provided with outwardly flared tape-ringY walls 9, and the same is fitted over a reduced projecting portion 10 of the connecting piece, a packing ring ll being preferably employed to make the'slip joint thus provided prcssure tight. At the oppositcor forward end of the connecting piece there is 'provided the shell 12 fitted about and slipped over the valve block 13 and its end plate 14;

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and also over a short end portion of the cylinder- 1. The latter, closely adjacent the shell portion of the connecting piece 8 is also provided with tapered Walls 15, similar to the tapered portion 9 en the feed cylinder, but reversely arranged. With the parts in the position shown they are all clamped rigidly together by means of the clamping collars 16 and 17, which latter have tapered openings to fit over the tapered Walls of the feed cylinder and tool cylinder, respectively, andare united and clamped together by means of the tie bolts 18 and the clamping nuts 19, the bolts passing throughlateral ears on the clamping collar. This provides a perfectly rigid connection for the feed cylind-er, tool cylinder andthe intervening connecting piece Without the use of threaded joints, and affords a connection capable of holding together under the most severe usage. y i

Referring now to Figs. 1, 2 and 3, at the opposite or supporting end of the feed cylinder, provision is made for a plug or guiding piece for. the piston rod inserted in the end of the cylinder and there retained without the use of threaded joints or threaded connections. While this may be effected in various Ways, in the present instance there is provided a plug 20 provided with a head and h aving a reduce portion fitting the end of the cylinder intoV which .it is stepped.

' The plug not only closes the end of the cylinder but provides a guide for the end of the piston rod 21, which latter terminates in the foot or pivoted end 22 adapted to abut against a fixed support, such as the wall shown in Fig.- 1.

In assembling the apparatus the plug is inserted and a. U-shaped retaining devicel is then driven into suitably drilled transverse holesin the Walls` of the cylinder and ofthe plug. The projecting ends of the retaining member (represented in dotted line, Fig. 3) are then bent over against the cylinder, as there shown, thus efectually locking the piece against displacement no matter how great the vibration may be .to which the apparatus is subjected. On the other hand, if it is desired to dismantle the apparatus, or remove the piston for any purpose, the plug may be Withdrawn by straightening j out the ends of the insertion member or key and withdrawing the latter to release the plug. Preferably means are provided, such as the relief* assage 24 for connecting the rearward endiof the feed cylinder with the atmosphere.

While I have herein shown and described for the purpose of illustration one concrete form or embodiment of my invention, it is to be understood that the same is not limited tothe details of construction, or relative form or arrangement of parts, or to the application herein made of the various fea- 2. In a pressure-fed tool, the combination with a feeding member, a tool member, said members having connection by ineens of slip joints, clamping collars encircling said feeding member and tool member respectively and means connecting said collars to each other for clamping the said members together.

3. In a pressure fed toolfthe combination with a feeding member provided with a tapered end, a tool member also having a tapered end, tapered means adapted to seat on said ends and connect the one member to the other,^an intermediate connecting section anld means for clamping said members to their tapered seats.-

4. In a pressure fed tool, the combination with a feeding member provided with van abutment, a tool cylinder provided with an abutment, a connecting piece to which said member and cylinder are both connected by means of slip joints, and clamping means 4including collars engaging said abutments,

respectively, for clamping said cylinder and feed member to said connecting piece.

In a pressure-actuated tool, the combination with a hammer tool having a cylinder, a tool feeding apparatus including a cylinder member and a. coperating piston member, an intermediate connecting'member having a slip joint connection both with said'feed cylinder and said tool cylinder, a throttle valve seated in said connecting member the latter bein provided with pressure Huid passages lea ing both to said feed cylinder and said tool cylinder, both said feed cylinder and said tool cylinder being provided with circumferential projections having longitudinally tapered surfaces, a clamping collar seated against the tapered projection 4on the tool cylinder, a second clamping collar seated against the tapered projection on the feed cylinder, and tie nation with a hammer tool having a cy1in der, a tool feeding apparatus including a cylinder member and a cooperating piston member, an intermediate connecting member having a slip joint connection both with said.

feed cylinder and said tool cylinder, a thi'ot-- tle valve seated in said connecting member,

the latter being provided with pressure fluid passages leading both to said feed cylinder and said tool member; both said feed cylinder and said tool cylinder being provided with circumferential projections, a clamping collar seated against the projection on the tool cylinder,- a second clamping collar seated against the projection on the feed cylinder and tie bolts connecting said clamping collars and serving to unite the feed cylinder, connecting member and the tool cylinder.

7. lu a pressure actuated tool, the combination with a hammer teol having a cylinder, a tool feeding apparatus including a cylinder member and a vcoperating piston iuciuber, an intermediate connecting member haring axslip joint connection both with said l'ecd cylinder and said ,tool cylinder, a throttle valve seated in said connecting ineuiber, the latter being provided with pressure lluid passages leading both to said lined cylinder audI said tool cylinder, and

means including a plurality of tic rodsvfor helping together the feed cylinder, coiii' niug member and tool cylinder.

t Iii a pressure-actuated tool the combination with a hammer tool, a tool teeding apparatus including a leed member, an intermediate connecting member havingr a slip `ioiut connection bolli with said feed lneiiiber and with said hammer tool, a throttle valve :rated iu said connecting member, the lutter beine' proridial with pressure -lluid passages leading bulli to said 'feed cylinder and said tool cylinder, and means including a plurality ot tie rods for clamping together the feed member, connecting member and hainmer tool. A

9. In a pressure-actuated tool, the combination with a hammer tool, a tool feeding apparatus including a vfeed member, an iiiterinediate member, a throttle valve seated therein, said connecting member being provided with pressure fluid passages leadingr both to the :feed cylinder and tool cylinder, and clamping means including a plurality of tie rods directly connected to the feed inninber and liaii'iiner tool for drawing both against the coimecting member and uniting the leed member, coi'iiiecting member and hammer tool.

10. In a pressure actuated tool, the conibination with a hammer tool having a cylinder, atool feeding apparatusincluding 'a cylinder member and a cooperating piston member, an intermediate connectingr memlier ha ving a slip Iioint connection both with the feed cylinder and the tool cylinder, said connecting member being provided with pressure fluid passages, and clamping means includinga plurality of tie rods and collars engaging' said feed cylinder and tool cylinder for clamping together the. 'feed cylinder, connecting member and tool cylinder.

ln testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

GEORGE Il. GILMAN.

l-Vitnesses:

li. J. BiiUoi-iaiin, C. J; Josas. 

